JPH0633941Y2 - Damper - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention is a gas-type fixed type fire extinguishing equipment using an extinguishing agent such as carbon dioxide, a halide, etc. The present invention relates to a damper which is directly attached to a building structure so as to automatically close the vent when the fire extinguishing equipment is started so that the emitted fire extinguishant does not flow out of the closed compartment.

○ Prior Art Although there are various types of dampers described above, there are problems in airtightness when closed and safety when closed, especially for large dampers that are directly attached to a building structure.

If airtightness is low when closed, extinguishant will flow out of the room, reducing the extinguishant concentration and reducing the fire extinguishing effect.For example, if the extinguishant is carbon dioxide, the extinguished carbon dioxide will cause acid flow in the room facing the compartment. There is a possibility of personal injury due to lack of status, and there is a problem in safety.

As a known damper used for smoke prevention, fire prevention, etc., a blade type is generally used, and one or more blades,
It is composed of an outer frame and an edge provided on the outer frame.

Fig. 5 shows an example of this, with blade 31 and blade 31, blade 31 and edge.
It has a structure in which it is overlapped with 33, and it has the advantage that the mounting base can be small, but this structure requires complicated bending work to cut off the plate thickness of the blade and edge members. In particular, if it is desired to increase the airtightness, it is necessary to use a dedicated mold, jig, or the like to improve the processing accuracy. A small size and suitable for mass production are good, but they are not suitable for manufacturing one product.

As for large dampers that are directly attached to buildings, it is difficult to mass-produce them due to the size of the openings in the buildings, and because they are directly attached to buildings, rigidity is required and the plate thickness of the members becomes thicker. There is a problem that complicated bending cannot be performed.

Therefore, in the present situation, the large damper directly attached to the building has a structure as shown in FIG. 6 and the bent portion is simplified as much as possible.

However, the damper as shown in FIG.
Since the gap between 31 and the outer frame 32 is large and the plate thickness of the member is large, the bending accuracy of the blades 31 is poor, the gap between the blades 31 is large, and it is difficult to ensure airtightness. is there. For example, in the case of a damper having four blades and a size of 2 m × 1 m, if the gap between the vane 31 and the outer frame 32 and the vane 31 and the vane 31 is 5 mm on average, the gap area is 0.5 × (200 × 5
^{+ 25 × 8) = 600cm 2} = 0.06m 2 , and the its closed area 2m ²
To 3%, and in actual equipment, there is distortion in the blade itself and distortion in mounting, and this gap becomes even larger.

In order to solve the above problem, the bent portion of the blade is further simplified, and as shown in FIG.
There is a packing 34 provided on the edge 33 and the blade 31 and the contact surface of the blade 31, but with the elastic packing 34 suitable for such a damper, there is a problem in fire resistance and heat resistance. Is unsuitable as In addition, the packing 34 needs to be replaced periodically because it has aged deterioration (deterioration).
Further, the one provided with the packing 34 has a problem that the closing device becomes large in size because the force required for the closing is large (for example, it is necessary for the closing when the packing is provided in the damper of FIG. 7 described above). Calculate the rotational moment: Even with a soft packing, the force required to compress a 10 cm long packing by 3 mm is about 1.5 kgf.
The rotational moment required for closing when packing is provided on all overlapping parts of 1 m damper is {1.5 × 200/10
× 12.5 × 2 + 1.5 × (12.5 × 2/10) × 6.25 × 2} × 4 ≒ 3
200kgf.cm, which requires a very large closure device).

○ Means for solving the above problems The present invention provides an edge of the same plate thickness on the inner surface side of the outer frame of the damper so as to be continuous over the entire circumference and have the same plane, and the center of rotation is determined from this edge. A damper blade having the same plate thickness as that of the edge is provided so that the position when separated and closed is the same plane as the edge, and between the edge and the damper blade in the closed position and between the adjacent damper blades. A reinforcing plate for the damper blade is provided so as to cover the gap between them.

Examples Examples will be described below based on examples shown in the drawings.

1 to 3 show a damper A embodying the present invention, which is located around a ventilation port B in a closed compartment and is a building structure C.
The outer frame 2 is fixed to the outer frame 2, an edge 3 welded to the inner peripheral surface of the outer frame 2, a damper blade 1, and a reinforcing plate 4. The edge 3 is formed of a member having an L-shaped cross section. And has a mounting surface 3b fixed to the inner peripheral surface of the outer frame 2 and a working surface 3a, and the working surface 3a has the same plate thickness so as to be continuous and have the same plane on the entire inner circumference of the outer frame 2. It is manufactured with the member of.

The plurality of damper blades 1 are positioned such that their closed positions are in the same plane (XX) as the working surface 3a of the edge 3, and the rotation center P thereof is "l" rather than the plane (XX). "Only inward position. That is, the L metal fitting 5 fixed to the damper blade 1 by the small screw 6 is fixed to the support shaft 8 via the nuts 7 and 7, and is displaced to the outer frame 2 by "l" with respect to the plane (XX). The support shaft 8 is rotatably supported at the position.

The support shaft 8 is driven by the operation of the cylinder 13 via the arms 11 and 12, so that the damper blade 1 can be freely changed between a closed position shown by a solid line and an open position shown by a virtual line.

At the closed position of the damper blade 1, the reinforcing plate 4 covering the gap G ₁ between the edge 3 and the damper blade 1 and the gap G ₂ between the adjacent damper blades 1, 1 is fixed to the end of the damper blade 1. To do. In the embodiment, the reinforcing plates 4 are attached on the upper and lower sides of the damper blade 1 on the opposite sides, and the reinforcing plates 4 of the adjacent damper blades 1 are opposed to the gap G ₂ .

Fig. 4 shows an example of a gas-type fixed fire extinguisher, D is a closed compartment, 14 is an extinguishant container, 15 is piping, 16 is a selection valve, 17 is a copper pipe, 18 is a check valve, 19 is a discharge valve. , 20 is a radiation nozzle, 21 is a control panel, 22 is wiring, 23 is a container valve opening device, 24 is a selection valve opening device, and 25 is a start push button.

The damper blade 1 is normally in the open position shown by the phantom line in FIG. 1, but when the fire is extinguished, the support shaft 8 is moved by the operation of the cylinder 13.
Is rotated to the closed position shown by the solid line in FIG. In the closed position, the gaps G ₁ , G ₂ are covered by the stiffener 4.
Therefore, the airtightness of the closed section D is improved.

In the embodiment, the cylinder 13 operated by gas pressure is used.
Although the support shaft 8 is configured to be rotationally driven by the above, it is needless to say that the support shaft can be rotationally driven by a self-weight type, a spring type, an electric type, or the like.

○ Effects of the invention (1) By overlapping the reinforcing plate and the edge of the damper blade and the reinforcing plate and the damper blade of the damper blade, the gap is significantly reduced and the airtightness is improved even without packing.

(2) Since the blade and the edge have the same plate thickness, theoretically the gap except the bearing is close to zero.

(3) Since the bending of the blades is eliminated and a combination of flat plates is used, there are advantages such as no need for a dedicated die, suitable for small-lot production of a wide variety of products, good processing accuracy, and compatible with large dampers.

(4) Since packing is not required, it is not necessary to press the damper blade and the edge, and the damper blade and the damper blade, and the rotational force of the support shaft can be small, so that the closing device can be downsized. Further, since excessive force is not applied to the damper blade and the support shaft, deterioration due to repeated operation is small and durability is improved.

(5) By displacing the support shaft, the edges can be made continuous, the flatness of the edges can be increased, and the processing accuracy is good. There is an effect that the bending process of the damper blade is unnecessary.

[Brief description of drawings]

FIG. 1 shows a damper showing an embodiment of the present invention, wherein FIG. 1a is a vertical sectional view, FIG. 1b is a detailed sectional view of a portion P in FIG. A, and FIG. FIG. 2 is a front view of the same. 3 is a transverse sectional view of the same, FIG. 3a is a sectional view taken along the line Sa-Sa in FIG. 2, and FIG. 3b is a sectional view taken along the line Sb-Sb in FIG. FIG. 4 is a schematic diagram showing an outline of a gas-type fixed fire extinguishing facility. 5 and 6 are schematic diagrams of known dampers. FIG. 7 is a schematic view of a known damper equipped with packing. 1 ... Damper blade 2 ... Outer frame 3 ... Edge 4 ... Reinforcement plate

Claims (1)

[Scope of utility model registration request] 1. A gas-type fixed-type fire extinguisher that uses a fire extinguisher such as carbon dioxide or a halide is provided at a ventilation port of a closed compartment so as to suppress a fire inside the fire extinguisher, and the fire extinguishing equipment is automatically activated when the fire extinguisher is started. In a damper in which the ventilation port is closed, an edge of the same plate thickness is provided on the inner surface side of the outer frame of the damper so as to be continuous over the entire circumference and have the same plane, and the center of rotation is determined from this edge. A damper blade having the same plate thickness as that of the edge is provided so that the position when separated and closed is the same plane as the edge, and between the edge and the damper blade in the closed position and between the adjacent damper blades. A damper characterized in that a reinforcing plate for the damper blade is provided so as to cover the gap between them.